beeman



(No Model.) 2 SheetsSheet 1.

- J. S. BEEMAN.

MAGNETO ELECTRIC MACHINE.

No. 288,915. Patented Nov. 20, 1883.

N. PETERS. Fhcwumq n hu. Washingi n. n. c.

(No Model.) 2 Sheets-Sheet 2.

'J. S. BEEMAN.

MAGNETO ELECTRIC MACHINE. No. 288,915. Patented Nov. 20, 1883.

UNITED STATES PATENT OEEIQE.

JOSEPH. S. BEEMAN, OF LONDOX, ENGLAND.

MAGNETO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 288,915, dated November 20, 1853.

Application filed February 2 1883. (No model.) Patented in England July .30, 1982, No. 3,455; in France January 13, 1853, No. 153,192; in Belgium January 24, 1883, X0. (10,216, and in Austria-Hungary May l, 1853, No. 4,877 and No. 1%061.

To all whom it may concern:

Be it known that I, J OSEPH SAMUEL BEE- MAN, of 67 Strand, London, England, have i11- vented new and useful Improvements in Magnote-Electric Machines, (for which I have obtained patents in England, No. 3,455, dated July 20, A.D.18S2,and in FrancefNo. 153,192, dated January 18, A. D. 1883,) of which the following is a specification.

The improvements relate to machinery for removing from the armature of a continuouscurrent dynamo or magneto electric machine certain sections of the circuit or circuits when they cease to be active in producing current, and replacing these sections into the circuit or circuits as they arrive at the active points in the magnetic field by means of insulated stops or contact-pieces fitted with metallic rubbingsurfaces at portions of their length or width, so that said surfaces connect and complete the circuit or circuits through the active portion or portions of the armature, and so saving power by cutting out the inactive portions of the armature The invention is performed by dividing, when necessary, the metallic conductor composing the armature into any number of sections. the last end of one section and the first end of the next section, or any convenient arrangement of series or groups of sections, being brought into electrical contact by means of springs or equivalents for impinging, and these armature-sections which are not active in producing current are removed from the circuit or circuits by the action of the springs which make and break contact with the interposed rubbing-surfaces when the armature is rotated.

The accompanying drawings will serve to illustrate the mode of performing the invention.

Figure 1 is an elevation of an armature, and Fig. 2 is aplan view of a commutator (unfolded) constructed according to my invention, and shown 'in end elevation at Fig. 3 and plan at Fig. at. Figs. 5 and 6 are plan views of modifications of a commutator, (unfolded) and Fig. 7 is a longitudinal section of Fig. 6. Fig. Sis an armature in which the opposite sections of metallic conductor are connected in series, and Figs. 9 and 10 are unfolded views of commutator adapted to Fig. 8.

A is an armaturering. Y is an insulated hub or carrier for the springs or rubbing-surfaces b c d efg h i and s (j j) 0 a m 7, which are arranged around the periphery of the carrier in two rows, as shown. I11 connection with the rotating carrier thus armed with springs or rubbingsurfaces is employed a fixed or stationary insulating-ring, preferablymade in two parts, K K, upon which are secured insulated metallic contact-pieces, with their external circuit-connections, M L N 1 In the arrangement shown in the drawings the insulating-ring occupies a position intermediate between the two rows of revolving springs, and the contact-pieces are arranged upon the sides of the ring-that is to say,those faces of the ring that are at right angles to the axis of revolution of the carrier. Of the contact-pieces two,L N, are on one side face of the ring, and are acted on by one row of revolving springs, and two, M and P, are on the opposite side face of the ring, and are acted on by the other row of revolving springs. The insulating-ring is held fixed or stationary by means which will permit it to be adjusted when desired. The ring, as before said, is preferably made in two parts, K K, this being with a view to permit of the independent adjustment of the pair of contactpieces on each side, and these parts are mounted on and held by the adjusting-bars X X.

B, O, D, E, F, G, H, and I are sections of metallicconductors 011 the armature, the first and last ends, I), &c., being connected with their corresponding letters of reference 011 the commutator or the modifications thereof, as indicated by dotted or broken. lines. \Vhen the armature and commutator rotate in the direction of the arrow, the springs Z) c d, &c., and on no, &c., as in Fig. 2, successively make and break contact with the circuit at L and M and at N and P. In Figs. 5, 6, and 7 the revolving springs are replaced by revolving rubbing-surfaces, and the fixed contact-pieces shown in Fig. 2 are replaced by fixed scratchbrushes or other springs, as shown. XV hen I connect the opposite sections of the metallic conductors in'the armature in series, as in Fig. 8, the first and last ends of these series being connected with their corresponding letters of reference in the commutator or modification thereof, as shown in Fig. 9 or 10, for instance, the springs or their equivalents make and break contact with the circuit at L and M only, and I only have half the number of revolving springs or their equivalents, and N and P are consequently dispensed with.

I claim as my invention- 1. In dynamo or magneto electric machines, a commutator consisting of a revolving insulated hub or carrier armed with springs, or their equivalent, arranged in two rows and connected with the coils of the armature, as hereinbefore described, in combination with a stationary insulator provided with contactpieces, or their equivalent, of which one half make contact with one row of springs and one half make contact with the other row of springs during the revolution of the carrier for the purpose of including in the circuit the armature-coilsbnly as they arrive at the active points in the magnetic field, and cutting out said coils as they arrive at an inactive portion of their revolution, all substantially as hereinbefore set forth.

2. The two-part stationary adjustable insulator-ring provided with contact-pieces, of which one half are carried by each part, in combination with the revolving insulated carrier furnished with contact springs or surfaces connected with the coils of the armature, as hereinbefore described, and arranged in rows upon the carrier, to operate in connection with the contact-pieces on the two-part ring, substantially as and for the purposes hereinbefore set forth.

Intestimony whereof I have signed this specification in the presence of two Subscribing witncsses.

J. S. BEEMAN.

lVitnesscs:

H. J. HADDAN, A. E. MELHUrsH. 

